Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7bbcf41492897af…

MALICIOUS

PDF

81.0 KB Created: 2021-08-02 09:46:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: 8bf314b8861c0eb43a1496e7c9a60f30 SHA-1: f1e34b902670fabf036d9ee499975535b9bbe65d SHA-256: b7bbcf41492897afd6a4eae3142506056e4c3dd77c9c0b7fafc50614d97d1721
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9944

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/5bcf36f582d4044b50d29e0a9d02d0e8/wewifetunopefi.pdf In PDF document text
    • http://helpibr.org/clients/f/fe/feaff840d005acecac0f151e8679c8db/File/22183907724.pdfIn PDF document text
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/1608f171da9ad1---78245628836.pdfIn PDF document text
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1609e20a96ff08---95979123454.pdfIn PDF document text
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082eff4e5ff4---65074125850.pdfIn PDF document text
    • https://grafitpoint.ru/wp-content/plugins/super-forms/uploads/php/files/d08b035d8d7ceb977ea79010a7688f1f/58585349070.pdfIn PDF document text
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/160842ac550103---pewokilemigimomibetek.pdfIn PDF document text
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fd034b3337e---vanutimodasezukox.pdfIn PDF document text
    • http://stpatricksreunion.com/clients/84553/File/wobakojofupisetadi.pdfIn PDF document text
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9c4e1907c4---39602743444.pdfIn PDF document text
    • https://polskieplytki.com/wp-content/plugins/super-forms/uploads/php/files/1414ce1877058e84805dd451dbd3c669/loxudamuxowadizoxezasuzis.pdfIn PDF document text
    • http://brezov-gaj.si/uporabnik/file/vibikanujida.pdfIn PDF document text
    • https://www.dynasil.com/wp-content/plugins/super-forms/uploads/php/files/b6079b6b810e811a5ffe84cb69afd0bb/88532682513.pdfIn PDF document text
    • https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/4879616944ef09cb94170944a0fff1df/17318977171.pdfIn PDF document text
    • http://baaningdoi.com/file_media/file_image/file/12787901179.pdfIn PDF document text
    • http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/160b445744b99d---xewajavokidowujazo.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c468f64293---98605152915.pdfIn PDF document text
    • https://israelonthehouse.com/wp-content/plugins/formcraft/file-upload/server/content/files/160916a4278def---69531019443.pdfIn PDF document text
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16084d130342e8---80154149632.pdfIn PDF document text
    • http://chistogood.ru/admin/ckfinder/userfiles/files/ziminon.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/a630b07a4cdfc0bc350fea5d7d70d6ae/82343507747.pdfIn PDF document text
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/160ba80601bcfd---87807661912.pdfIn PDF document text
    • http://goksirkrupskimlyn.pl/img/upload/files/88754099867.pdfIn PDF document text
    • http://www.deco-interieure.com/userfiles/file/zasudovatuwo.pdfIn PDF document text
    • http://shinserviceodi.ru/wp-content/plugins/super-forms/uploads/php/files/726fdc700788055901f72ed955ebc58d/19392426587.pdfIn PDF document text
    • http://fonnepal.org/userfiles/file/85929541199.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=criminal+justice+organizations+administration+and+management+6th+edition+pdfPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d6fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6FE 16572 bytes
SHA-256: 7f94682032aa2db2ba9dd35df463e3622a029dba9780c897bd05a9a550e01cc0
font_01_sfnt_off000101d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101D1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000119e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119E8 11556 bytes
SHA-256: f94c76e335971da9339e6e84d337ae4ee21e48b504f738d177d875ef79bd98a2

Open this report in the interactive analyzer, or submit your own file for analysis.